Combined grinding and cleaning mill.



W. G. PRITOHARD.

COMBINED GRINDING AND CLEANING MILL.

APPLICATION FILED JUNE 17, 191x.

1,049,395. Patented Jan. 7, 1913.

3 SHEETS SHEET 1.

2? ll A WITNESSES INVENTOR W. C. PRITGHARD.

COMBINED GRINDING AND CLEANING MILL.

APPLICATION FILED JUNE 17. 1911.

1,049,395. Patented Jan. 7, 1913 3 SHEETSSHBET 2.

WI'IN ESSES INVENTOR W. C. PRITCHARD.

COMBINED GRINDING AND CLEANING MILL APPLICATION FILED JUNE 17 191;,

1,049,395. Pmmea Jan 7, 1913.

a SHEIJ'I'S HEET 3.

WITNESSES INVEN'IOR UNITED STATES PATENT oFFIoE,

WILLIAM c. rn'rrcnann'or LANCASTER, PENNSYLVANIA. r

COMBINED QRINbIIlG-AND CL EANING MILL;

T all whom t may con/ ern.

'3 drawing,-

Be it known that I, "VILL'I M C. Farrow ARD', a citizen 'of the United States, residing;v ,at- Lancaster, in the. countyof Lancaster and State of Pennsylvania, have invented certain new and useful .Tn'iprovements in- Combined (iiri'ndim, and Cleaning vMills, of which the following, is a specification, refer: ence being bad therein. to the accompanying -.'lhis"inventidn relates, to a combined grinding and cleaning nnll adapted for grinding grain and relating more particularly to thelgrind ingand cleaning of coffee,-

In the grinding of coffee thereis a certain clia-fi" that is loosened when the cofl'ee berry is first broken into a'few parts andivhich, if allowed toremain until the berrybecoines entirely ground to; the proper" fineness for use, .cannotthen be removed-without carrying-aquantity of the ground 'eotfee with it.

The object of the invention is to construct a. mill of the. double grinding type, that is, a. mill having-a crushing .set of burs and a grinding set of burs, the object-being to separate the chaff, dust and dirt from the coffee berry after it haspasscd through the {rindin, or crushing burs, and before it enters the grinding of fine burs. To accomplish-thisand other objects, I have provided novel mechanism which isvsimple, durable 'and cheap, being, both easy of adjustment and effectual:

While-I am aware that there are combined cleanersand grinders whereit is intended to eliminate the. chatl'landedi-rtfronil the partly ground eotl'ee by suction, it isii iposinvention consists in ce'lain construction 50 sible to -aecomplish".the desired resqltin this manner, as all of 'tlie' foreifg'n matter can not be sucked from a.sol-id st-r( .a in of part-1y ground coffee; and it 18 therefore essential that the stream of coffee be broken up into a thin flow and passed over a broad surface, and the foreign, matter, such as chatff dirt', etc, be separated bya blast of air directed through said; tlo w in; a direction opposite to the sameJE 3 With these and other oljjectsinview, my

and combination of par v s will hereinafter berlcscribed 'and clail in the annexed specification andillustrated'in the accompanying drawings whichform a part of this application, and in which like figures of reference refer to corresponding parts in all Specification of Letters Patent. Application filed June 11, 1911. swarm. 33,688.

'sa me. 1 52.13, is a top plan view of the same; Fig. 4, s a sectional view taken on the. line -\'i ew of the automatic bur 'releasingmech nism with partsof the casing cut awaytd from the motor shaft 5, 'or'by crank 15; the motor 4', thus running-idle tindacting as abalaucc wheel; Upon the' ndsj;

of the views; but it is fully understood that while Iha re here described invention as shown, that I do not confine myself-to the exact-design, as slight changes maybemad'e .in the construction and arrangement of tli i Patented Jan.

several parts without departing from the] spirit of the invention. c

In the dm'wings:-Figure 1,,is a side elevation of 'a grinding mill forpotfee', '1

partly section'and embodying my inve'n tion. h1g2, is an end,elevation of;the

XX of- Fig-2'. Fig. 5, is a fragmentary exposethe parts. v Beferring to the drawings; a hollow base is indicated-by '1, which is'pr0videdw'ith-=n' glass, door 2, .and a dirt collectingdrawe'r 3. Upon the'base 1, is mounted ainotog 4, pm

vided with a tlriringsha'ft'fi, extndihgfroml ii both; ends thereof.

Supported upon the brackets 6, which-are seem ed to the base 1, and by the'b'racket'Y, which is secured to the top of the motor 4,

are the general 'frame and casing-which are in two parts8, and 9. The upperartof the frame 9, is formed with the bearings. 10, withrnwhich is rot-atably "mountedth'e counter-shaftll, which is cit-lierfdlri-veti by.

the sprockets 1-2, and 13, and-the. Chain 14,

the hand jof said .gounterj shaft 11', are; mounted the crushing burs 16,- and :17, which are'adj'ujstable by the screw -18', a'ndloek-nut l9, and I which are. also provided with auttm-iatie re leasing mechanism which forms the'subject of the Patent Number 1,011,243, issued December 12, 1911. Said crushing burs 16,.

and 17, are fed hya feed p'ipe orpassage 20,

from a hopper 21, supported by the casing S, and the crushed grain or coffee berries V shaped exhaust duet 34, which extends to and lock-nut- 30. "fihepassage 25,.is formed deflector plate 23, and directly over the pas- Y there is formed in the side of the passage supported on a bracket- 43, outsideof-su'id 2'1, imd 28, mounted; on said motor shift 5, and provided with adjustment screw 29,

with an air=intake opening3l, which is'p ro-s vided with an'air' inlet pipe The dis charge passage. 2' isf provided with-stun within .a short distance of the edge of'the a hinged door -10, which is operated by. a lever {L1, from the above referred to mechit: nism to swing said door 40,1101'055' said passage-22, atan angle to, close the same-mid direct-the contents of the burs into a trayZ,

casing 8;' in a, normal position said door 40,

is closed by a spring 44, attached thereto and to said lever.

- Having thus described my i-nvcniion Whili- I clajin as new and desire to 'ters Patentis: Y

The combination inn grinding and cleaning'mill, of a casing, feeding means above secure by Letsald casing, grinding means within the w in forcoiiperait-ion with the feeding means, said casing being formed within we depend ing duct in one side thereof, said duct 0p en-' ing into the casing, an inelined deflector plate secured to the in'teri01f'6i the casing and extending beneath the duct, an'exten means disposed within the easing, beneath the passage. v In testimony whereof afii in presence oftwo witnesses v WILLIAM C. PRITCHARD.

i iV'itness es:

\VMQJQCOUIJI'ER,

, JOHN J THQMPSQN;

sionforme'dupon the deflector plate and depending inparallel .relationf to the casing,isaid extension producing passageysaid casing-hai ing an opening in Zone side there: of leading into the passageg'and discharge 2; my signature I 

